8. Pulmonary function testing

Question 1

normal PEFR

Answer 1

> or equal to 80%

Question 2

factors to consider for ‘normal’ PEFR

Answer 2

age
height
gender

Question 3

use of peak flow

Answer 3

baseline, monitor asthmas and pick up acute deterioration

Question 4

inspiratory reserve volume

Answer 4

additional air that can be inhaled after normal inspiration

Question 5

expiratory reserve volume

Answer 5

additional air that can be exhaled after normal expiration

Question 6

residual volume

Answer 6

air remaining in lungs after max forceful expriation

Question 7

inspiratory capacity

Answer 7

volume of air that can be inhaled after normal expiration (tidal volume + inspiratory reserve volume)

Question 8

functional residual capacity

Answer 8

volume of air in lungs after end of passive expiration (expiratory reserve volume + residual volume)

Question 9

2 examples of obstructive lung disease

Answer 9

COPD
asthma

Question 10

what improvement in FEV1 should be seen in asthmatics after using bronchodilators?

Answer 10

12% or more

Question 11

2 examples of restrictive lung disease

Answer 11

interstitial lung disease
kyphoscoliosis
myasthenia gravis

Question 12

is obstructive lung disease an inspiration or expiratory issue?

Answer 12

expiratory

Question 13

coving

Answer 13

in obstructive lung disease, FEF25-75 reduced

Question 14

flow volume loop shape in restrictive lung disease

Answer 14

same shape, just shrunken

Question 15

what’s suggested by abnormal DLCO but normal CXR and spirometry?

Answer 15

vascular problem e.g. pulmonary arterial hypertension

need to confirm via other tests

Question 16

DLCO

Answer 16

diffusing capacity carbon monoxide

Question 17

examples of disease with:
1. restrictive pattern and abnormal DLCO
2. restrictive pattern and normal DLCO
-chest wall abnormality
-neuromuscular disease

Answer 17

1. parenchymal lung disease
   2.
   -kyphoscoliosis
   -myasthenia gratis